Tradition – Why do the Antediluvians want to eat their spawn?

I am currently involved in my first World of Darkness game. When I read the clan book for my clan (Nosferatu), I realize that the fear exists of the antediluvian founder of the clan and devours vampires of the current generation.

Because of my conversations with other players, their clan books say similar things.

However, none of us is sure where this fear came from. Why would Antediluvian want to exploit vampires of the current generation?